1421155328 has 22 divisors (see below), whose sum is σ = 2840924856. Its totient is φ = 710577152.

The previous prime is 1421155327. The next prime is 1421155357. The reversal of 1421155328 is 8235511241.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1421155294 and 1421155303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421155327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692900 + ... + 694947.

It is an arithmetic number, because the mean of its divisors is an integer number (129132948).

Almost surely, 2^1421155328 is an apocalyptic number.

It is an amenable number.

1421155328 is a deficient number, since it is larger than the sum of its proper divisors (1419769528).

1421155328 is an equidigital number, since it uses as much as digits as its factorization.

1421155328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387867 (or 1387849 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 1421155328 is about 37698.2138568925. The cubic root of 1421155328 is about 1124.2956125244.

Adding to 1421155328 its reverse (8235511241), we get a palindrome (9656666569).

The spelling of 1421155328 in words is "one billion, four hundred twenty-one million, one hundred fifty-five thousand, three hundred twenty-eight".